Rosser W. Garrison

A redefinition of Telagrion Selys and Aceratobasis Kennedy stat. rev. and the description of Schistolobos gen. nov. for Telagrion boliviense Daigle (Odonata: Coenagrionidae)

Abstract The species currently included in Telagrion Selys are found to belong to three different genera: Telagrion sensu stricto, monotypic, including only the type species T. longum Selys, Schistolobos gen. nov., also monotypic, including Telagrion boliviense Daigle, and Aceratobasis Kennedy, resurrected to include Metaleptobasis cornicauda Calvert (type species), Agrion macilentum Rambur, Telagrion mourei Santos and T. nathaliae Lencioni. Synonymic lists, diagnoses, illustrations and distribution maps for the three genera and a key for species of Aceratobasis are provided.

The true Argia difficilis Selys, 1865, with the description of Argia yungensis sp. nov. (Odonata: Coenagrionidae)

Abstract Argia yungensis sp. nov., a new species close to Argia difficilis, is described. Both species are illustrated and diagnosed and their distributions mapped. They can be distinguished by the morphology of male tori, cerci and paraproct, and female prothorax. Their distributions are allopatric, with Argia yungensis distributed along the foothill jungle of the Yungas rain forest from NW Argentina to Peru, and A. difficilis from Peru and Brazil to Venezuela across the lowland Amazon forest. Argia extranea forficula Fraser is synonymyzed with A. difficilis, and the latter is redescribed.

Case 3584 Erythemis Hagen, 1861: proposed precedence over Lepthemis Hagen, 1861 (Insecta, Odonata)

Abstract. The purpose of this application, under Articles 23.9.3 and 81.1 of the Code, is to conserve the widespread usage of the generic name Erythemis Hagen, 1861 for a group of common dragonflies from the New World over the simultaneously published nominal genus Lepthemis Hagen, 1861, selected to take precedence by the First Reviser action (Article 24.2), whenever these names are considered to be synonyms. This proposal seeks to achieve the least change in the nomenclature of the species currently placed in these two genera, in strict accordance with Principle 4 of the Code.